How to build a simple electronic focus for your DIY WebCam Microscope? Allmost all todays compact disc players have an electronic focus element composed of a small lens and two electric coils. The lens can be moved up and down by powering one of the two coils with around 1.5 volts. Compact Disc Focus Element […]
2 Comments

Just found that article from last year in Mladina 18 | 12. 5. 2011 http://www.mladina.si/53987/biohekerji/